Blue Lock: Episode Nagi manga volume 4 features story and art by Kota Sannomiya and is a prequel series to Blue Lock.

After getting “stolen” by Isagi's team, Nagi finds himself torn between his newly awakened ego and his friendship with Reo. Can the two friends ever repair their relationship after Nagi's apparent betrayal? That question gets put to the test as Nagi, Isagi, and Barou face off against Reo, Kunigami, and Chigiri for a chance to clear the Second Selection. Reo will do whatever it takes to steal Nagi back…but will it be enough?